From 056f394151a48e9d129691fd7451a3d0bcbde3ba Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 3 Sep 2006 05:11:57 +0000
Subject: Saner (internal) query API, though still needs work. Preliminary
 (untested) support for host features/extensions/whatever. Documentation fixes
 and minor cleanups.

git-svn-id: http://svn.drobilla.net/lad/libslv2@113 a436a847-0d15-0410-975c-d299462d15a1
---
 slv2/plugin.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
 slv2/query.h  | 25 +++++++++++++++++--------
 2 files changed, 61 insertions(+), 8 deletions(-)

(limited to 'slv2')

diff --git a/slv2/plugin.h b/slv2/plugin.h
index 57fa266..95d933e 100644
--- a/slv2/plugin.h
+++ b/slv2/plugin.h
@@ -179,6 +179,50 @@ slv2_plugin_has_latency(const SLV2Plugin* p);
 uint32_t
 slv2_plugin_get_latency_port(const SLV2Plugin* p);
 
+#if 0
+/** Return whether or not a plugin supports the given host feature / extension.
+ *
+ * This will return true for both supported and required host features.
+ */
+bool
+slv2_plugin_supports_feature(const SLV2Plugin* p, const char* feature_uri);
+
+
+/** Return whether or not a plugin requires the given host feature / extension.
+ *
+ * If a plugin requires a feature, that feature MUST be passed to the plugin's
+ * instantiate method or the plugin will fail to instantiate.
+ */
+bool
+slv2_plugin_requires_features(const SLV2Plugin* p, const char* feature_uri);
+#endif
+
+/** Get a plugin's supported host features / extensions.
+ *
+ * This returns a list of all supported features (both required and optional).
+ */
+SLV2Property
+slv2_plugin_get_supported_features(const SLV2Plugin* p);
+
+
+/** Get a plugin's requires host features / extensions.
+ *
+ * All feature URI's returned by this call MUST be passed to the plugin's
+ * instantiate method for the plugin to instantiate successfully.
+ */
+SLV2Property
+slv2_plugin_get_required_features(const SLV2Plugin* p);
+
+
+/** Get a plugin's optional host features / extensions.
+ *
+ * If the feature URI's returned by this method are passed to the plugin's
+ * instantiate method, those features will be used by the function, otherwise
+ * the plugin will act as it would if it did not support that feature at all.
+ */
+SLV2Property
+slv2_plugin_get_optional_features(const SLV2Plugin* p);
+
 
 /** @} */
 
diff --git a/slv2/query.h b/slv2/query.h
index 9f1c93d..a23df0e 100644
--- a/slv2/query.h
+++ b/slv2/query.h
@@ -74,23 +74,32 @@ char*
 slv2_query_lang_filter(const char* variable);
 
 
-/** Run a SPARQL query on a plugin's data file.
+/** Run a SPARQL query on a plugin's data file and return variable matches.
  *
  * Header from slv2query_header will be prepended to passed query string (so
  * the default prefixes will be already defined, you don't need to add them
  * yourself).
  *
- * rasqal_init() must be called by the caller before calling this function.
+ * Returned is a list of all matches for the query variable \a var_name.
  */
-rasqal_query_results*
-slv2_plugin_run_query(const SLV2Plugin* p,
-                      const char*       query_string);
+SLV2Property
+slv2_query_get_results(const SLV2Plugin* p,
+                       const char*       query_string,
+                       const char*       var_name);
+
 
+/** Run a SPARQL query on a plugin's data file and just count the matches.
+ *
+ * Header from slv2query_header will be prepended to passed query string (so
+ * the default prefixes will be already defined, you don't need to add them
+ * yourself).
+ *
+ * Returned is the total of all variable matches resulting from the query.
+ */
 size_t
-slv2_query_get_num_results(rasqal_query_results* results, const char* var_name);
+slv2_query_count_results(const SLV2Plugin* p,
+                         const char*       query_string);
 
-SLV2Property
-slv2_query_get_results(rasqal_query_results* results, const char* var_name);
 
 /** Free an SLV2Property. */
 void
-- 
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